scholarly journals Magnetic properties of natural goethite-III. Magnetic behaviour and properties of minerals originating from goethite dehydration during thermal demagnetization

1990 ◽  
Vol 103 (1) ◽  
pp. 233-250 ◽  
Author(s):  
M. J. Dekkers
Keyword(s):  
Magnetic Properties ◽  
Magnetic Behaviour ◽  
Thermal Demagnetization

scholarly journals Effect of coverage on the magnetic properties of -COOH, -SH, and -NH2 ligand-protected cobalt nanoparticles

Nanoscale ◽  
2021 ◽  
Author(s):  
Barbara Farkas ◽  
Nora Henriette De Leeuw
Keyword(s):  
Magnetic Properties ◽  
Magnetic Nanoparticles ◽  
Cobalt Nanoparticles ◽  
Magnetic Behaviour

Implementation of magnetic nanoparticles in biomedicine requires their passivation, which often comes at a cost of diminished magnetic properties. For the design of nano-agents with targeted magnetic behaviour, it is...

Studies of metal halides. Magnetic properties of some molybdenum(III) binuclear complex halides

1969 ◽  
Vol 22 (1) ◽  
pp. 121 ◽  
Author(s):  
IE Grey ◽  
PW Smith
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Binuclear Complex ◽  
Magnetic Behaviour ◽  
Metal Halides ◽  
Metal Interaction ◽  
Metal Metal ◽  
Halide Complexes

The variation of magnetic susceptibility with temperature for a number of binuclear halide complexes of molybdenum of formula A3IMo2X9 (A = Cs, Et4N, Et3NH; X = Cl, Br) has been studied over the range 90-400�K. The magnetic behaviour is consistent with that expected for magnetically isolated exchange-coupled pairs of molybdenum atoms. The coupling is interpreted as occurring mainly by direct metal-metal interaction rather than superexchange.

scholarly journals The magnetic mechanical analysis of manganese steel

1921 ◽  
Vol 98 (692) ◽  
pp. 297-302 ◽  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Magnetic Properties ◽  
Chemical Analysis ◽  
Cold Water ◽  
Mechanical Analysis ◽  
Magnetic Behaviour ◽  
Manganese Steel

One of the most interesting alloys for the study of its magnetic properties is manganese steel. The following paper is an attempt to correlate some of the magnetic and mechanical properties of manganese steel, in the hope that as such data are circulated it will eventually be possible to interpret from the magnetic behaviour of steel what the mechanical properties will be. Six manganese steel rods supplied by one of the authors were drawn from the same source, 76 cm. long and 0·95 cm. in diameter, and used “as drawn.” These rods were marked 1, 2, 3, 4, 5, and 6 respectively. The chemical analysis was made on rod No. 4 and showed:— C................................1.25 per cent. Si................................ 0.43 „ Mn...............................12.20 „ The record for the heat treatment was as follows:—“ All six bars were treated at 1000° C. (five minutes), and then water-quenched in ordinary cold water. Nos. 1, 5 and 6 were then enclosed in an iron pipe welded over at the ends, and annealed. The time for cooling from 550° C. to 450° C. was about eight hours. As this treatment did not make the bars sufficiently magnetic they were again annealed at 500° C. (530° C.—475° C.) for sixty hours."

Magnetische Eigenschaften der Normaltemperaturform von CsTmO2 / Magnetic Properties of the Normal-Temperature Form of CsTmO2

1979 ◽  
Vol 34 (8) ◽  
pp. 997-1002 ◽  
Author(s):  
Werner Urland
Keyword(s):  
Magnetic Properties ◽  
Magnetic Anisotropy ◽  
Crystal Field ◽  
Ground State ◽  
Low Temperatures ◽  
Magnetic Behaviour ◽  
Magnetic Data ◽  
Angular Overlap Model ◽  
Temperature Form ◽  
Overlap Model

AbstractThe magnetic behaviour of the normal-temperature-form of CsTmO2 (NT-CsTmO2) has been studied in the temperature range between 2.9 and 251.3 K. In order to interpret the magnetic data a method applying the angular overlap model has been established to assess the crystal-field (CF) parameters of NT-CsTmO2 (CF symmetry: D3d) from the known CF parameters for Tm3+ substituted in YVO4 (CF symmetry: D2d)-With these CF parameters the observed magnetic properties of NT-CsTmO2 can be satisfactorily simulated. The calculation of the paramagnetic principal susceptibilities yields a high magnetic anisotropy, especially at low temperatures. The energy values of the CF levels of the 3H6 ground state are calculated.

scholarly journals Tracing of traffic-related pollution using magnetic properties of topsoils in Daejeon, Korea

2020 ◽  
Vol 79 (20) ◽  
Author(s):  
Seungwoo Lee ◽  
Seoyeon Kim ◽  
Hyeji Kim ◽  
Youlee Seo ◽  
Yeoncheol Ha ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Remanent Magnetization ◽  
Coarse Grained ◽  
Morphological Observation ◽  
Exhaust Emission ◽  
Thermal Demagnetization ◽  
Main Street ◽  
Traffic Related Pollution ◽  
The Difference

Abstract The present study was designed to explore the possibility of roadside pollution screening using magnetic properties of topsoil samples in Daejeon, South Korea. Low-field magnetic susceptibility, frequency dependence of magnetic susceptibility, susceptibility of anhysteretic remanent magnetization, isothermal remanent magnetization (IRM) acquisition and demagnetization, back-field IRM treatment, and thermal demagnetization of composite IRM were determined for roadside topsoil samples. Magnetic susceptibility measured on 238 samples from the upper 5 cm of the topsoils ranged from 8.6 to 82.5 × 10–5 SI with a mean of 28.3 ± 10.8 × 10–5 SI. The proximal zone, 55 m wide area situated on either side of the main street, exhibited an enhancement of magnetic susceptibility. In areas distant from the main street, low magnetic susceptibility (< 50 × 10–5 SI) was observed. The topsoil samples exhibited significant susceptibility contrasts, suggesting that two dimensional magnetic mapping was effective in identifying traffic-related pollution. A few magnetic hotspots with intensities of magnetic susceptibility near or over 50 × 10–5 SI might reflect the difference in topographic elevation and surface morphology. Among various IRM-related parameters, remanence of coercivity was most significant statistically. In most samples, IRM component analysis provided dual coercivity components. Thermal demagnetization of composite IRM and morphological observation of magnetic separates suggest angular magnetite produced by vehicle non-exhaust emissions spherical magnetite derived from exhaust emission to be the dominant contributors to the magnetic signal. It is likely that lower- and higher-coercivity components represent the presence of coarse-grained angular magnetite and fine-grained spherical magnetite, respectively.

Antiferromagnetic Coupling In A (μ-Hydroxo)(μ-Pyrazolato)Dicopper(II) Complex. Synthesis, Crystal Structure, Magnetic Properties, And Theoretical Studies

2001 ◽  
Vol 56 (8) ◽  
pp. 719-727 ◽  
Author(s):  
H. Kara ◽  
Y. Elerman ◽  
K. Prout
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Variable Temperature ◽  
Magnetic Behaviour ◽  
Antiferromagnetic Coupling ◽  
Theoretical Studies ◽  
Powdered Sample ◽  
Structural Factors ◽  
Binuclear Copper ◽  
Ligand Orbital

Preparation, crystal structure and magnetic properties of a 3,5-dimethylpyrazolate bridged binuclear copper(II) complex [Cu2(L1)(3,5 prz)] (L1 = 1,3-Bis(2-hydroxy-1-napthylideneamino) propan-2-ol) (1) are reported. Variable-temperature magnetic susceptibility measurements for a powdered sample of the complex were carried out in the temperature range 5 - 350 K and analysed to obtain values of the parameter J in the exchange Hamiltonian H = -2JS1·S2 . In the dicopper(II) complex [Cu2(L2)(3,5 prz)], (L2 = l,3-Bis(2-hydroxy-5-chlorosalicylideneamino) propan-2-ol) (2) reported recently the antiferromagnetic interaction is much less than that of 1 (-27 = 440 cm-1 ), as result which is difficult to explain in terms of structural factors on the basis of widely accepted criteria. The differences in the magnetic behaviour now have been rationalized using the “ligand orbital complementary” concept

scholarly journals Magnetic Properties of the Bismuth Oxide α — Bi2O3

1996 ◽  
Vol 51 (5-6) ◽  
pp. 665-666 ◽  
Author(s):  
A.I. Kharkovskii ◽  
V.l. Nizhankovskii ◽  
E. A. Kravchenko ◽  
V. G. Orlov
Keyword(s):  
Magnetic Properties ◽  
Bismuth Oxide ◽  
Magnetoelectric Effect ◽  
Magnetic Moments ◽  
Magnetic Behaviour ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Physical Origin ◽  
Wide Range ◽  
Electric Dipoles

Abstract A very unusual magnetic behaviour of α - Bi2O3 was observed in a wide range of temperatures and magnetic fields. A longitudinal magnetoelectric effect was found at 4.2 K. The existence of an antiferroelectrically ordered subsystem of electric dipoles in α - Bi2O3is proposed. The mechanism of spin-orbit coupling is regarded as the physical origin for the occurrence of the ordered magnetic moments in α - Bi2O3.

The Influence of Si, Ga and Gd Content on the Magnetic Properties of Pr-Fe-Co-B-Nb HDDR Bonded Magnets

2006 ◽  
Vol 530-531 ◽  
pp. 164-169
Author(s):  
E. Galego ◽  
Hidetoshi Takiishi ◽  
Rubens Nunes de Faria Jr.
Keyword(s):  
Magnetic Properties ◽  
Permanent Magnets ◽  
Magnetic Behaviour ◽  
Element Content ◽  
Cyanoacrylate Adhesive ◽  
Microstructure And Magnetic Properties

This paper reports the results of investigations carried out to determine the microstructure and magnetic properties of some praseodymium-based magnets represented by the formula Pr14Fe63.9-xCo16B6Nb0.1Mx. Bonded magnets were prepared the annealed alloys using the hydrogenation, disproportionation, desorption and recombination (HDDR) process. The HDDR powders were isostatically pressed and bonded with cyanoacrylate adhesive to form permanent magnets. The effect of addition element content on the magnetic properties of these magnets was investigated. The amount of addition has a significant effect on the magnetic behaviour of these bonded magnets.

scholarly journals Investigation of the role of morphology on the magnetic properties of Ca2Mn3O8 materials

2017 ◽  
Vol 46 (41) ◽  
pp. 14130-14138 ◽  
Author(s):  
Laura J. Vera Stimpson ◽  
Silvia Ramos ◽  
Gavin B. G. Stenning ◽  
Marek Jura ◽  
Stephen Parry ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetic Behaviour ◽  
Bow Tie

Ca2Mn3O8 exhibits a complex ‘bow-tie’ magnetic lattice resulting in interesting magnetic behaviour.

scholarly journals Electrochemical, Electrocatalytic, and Magnetic Properties of Vanadium-Containing Polyoxometalates

2021 ◽  
Vol 7 (12) ◽  
pp. 157
Author(s):  
Joseph Dika Manga ◽  
Anne-Lucie Teillout ◽  
Eric Rivière ◽  
Pedro de Oliveira ◽  
Israël Martyr Mbomekallé
Keyword(s):  
Oxidative Stress ◽  
Magnetic Properties ◽  
General Formula ◽  
Low Temperatures ◽  
Magnetic Behaviour ◽  
Ph Values ◽  
Ph Dependency ◽  
Paramagnetic Behaviour ◽  
Electro Oxidation ◽  
Interesting Species

Mono-substituted vanadium-containing Dawson-type polyoxometalates having the general formula α1-[VIVW17X2O62]8− and α2-[VIVW17X2O62]8−, with X = As or P, were synthesised and subject to a comprehensive electrochemical study comprising the pH dependency. These POMs exhibit an electrocatalytic behaviour towards the oxidation of thiols (namely cysteine), rendering them interesting species for mimicking oxidative stress situations, at physiological pH values. The efficiency of the electro-oxidation was assessed with thiols of different nature, and the substrate that responded best was used to compare the electrocatalytic capabilities of the POM series. The magnetic behaviour of these POMs was also evaluated and compared to their analogues, α1- and α2-[VVW17X2O62]7− (X = As or P), at low temperatures and showed, as expected, a paramagnetic behaviour of VIV based compounds.

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